Cannot translate the Billing Details Form on Checkout page

https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/5015588636/original/Safari-2.jpg?AWSAccessKeyId=AKIAJ2JSYZ7O3I4JO6DA&Expires=1431355977&Signature=POTgtP1ijq8sycnN2fBJ%2BPRs9Y0%3D&response-content-type=image%2Fjpeg

Please see the link. I cannot translate the billing details form on the checkout page. Please help me, how doing that. My whole site was translated, but this page cannot translate.

Please help me.

Thanks

https://www.ads-software.com/plugins/woocommerce/